MTM J-20 Slip Top Ammo Box 7mm Rem -338 Win Clear Green

The MTM J-20 Slip Top Ammo Box for 7mm Rem Mag and .338 Win Mag is a purpose-built ammunition storage solution engineered for precision rifle ammunition. Manufactured by MTM Molded Products Company, this clear green polypropylene case delivers the durability and reliability demanded by competitive shooters, reloaders, and field-active riflemen who depend on consistent ammunition organization and protection.

Constructed from virtually indestructible polypropylene, the J-20 resists warping, cracking, chipping, peeling, and temperature-induced expansion or contraction—critical attributes for ammunition storage across variable field and storage conditions. The slip-top design accommodates reloaders who prefer the lid to remain clear of loaded rounds, and the case geometry allows expansion up to approximately half an inch without dimensional compromise. All rounds are positioned bullet-up for quick visual inventory and safe handling. The transparent clear green construction enables immediate cartridge identification without opening the case.

This ammo box is ideal for shooters who reload or hand-load magnum rifle cartridges and require secure, stackable storage for high-value ammunition. Competitive long-range shooters, hunters working with premium magnum loads, and ammunition stockers benefit from the J-20's compact footprint and durable construction. The polypropylene material withstands range day temperature swings, vehicle transport, and extended field storage without degradation.

MTM J-20 ammunition cases are available in five size configurations to match specific magnum and standard cartridges. The slip-top design positions this J-20 variant between fully enclosed cases and open-access storage, making it a preferred choice for reloaders and shooters who value both protection and accessibility.